Welcome.

The RM Group specializes in creating products and services designed to help you perform investigative water penetration and air infiltration testing within the strict guidelines of ASTM, AAMA, WDMA and CSA.

Our products are guaranteed to do their job so you’re free to do yours without the hassles and worries of building and maintaining your own equipment.

The patented design of the Rain Maker spray rack has been helping test engineers, builders, window companies, and others save valuable time and money in the field for over four years. See our testimonials page to read the raves that the Rain Maker and our other products have received. We’ve also begun offering full training in our new training center. We’ve provided helpful links such as the standards page to shorten your research time. And the accessories page can help you find other helpful materials.